Patent GB-191500670-A (GB)
Title: Improvements in or relating to Mechanism for Separating Fasteners or the like from a Source of Supply in Machines for use in the Manufacture of Boots and Shoes.
IPC: A43D5/12
Filed: 1915-01-15
Abstract: 670. Jerram, A. E., Keall, F. B., and British United Shoe Machinery Co. Jan. 15. Loose-nailing. - The fastener - separating mechanism of a handmethod lasting-machine or other fastener-inserting machine used in the manufacture of boots and shoes, of the type in which the shoe is moved step by step to bring different parts of the work under the driver, is located remote from the tack block &c. or the driver passage, and is connected thereto by a duct down which the fastener is impelled by an air blast. The invention is described as applied to a machine of the type described is Specification 14,453/97, [Class 17, Boots &c.]. The tack pot 6 is divided into three compartments to receive, for example, long and short McKay tacks and welt tacks, which are lifted by rotating scoops 23 and dropped into race-ways 27, at the bottom of each of which is a separator. These separators are carried by a bracket 30, and each comprises a block 29, Figs. 4 and 6, with a stepped portion 31 ending in a pin 33 which passes through lugs 34, 35 on a block 36, and an oscillating-block 32; the blocks 32, 36 are held against endlong movement by a nut 37. The block 32 has mounted on it a plate formed with a separating-notch 39 ending in a circular extremity 39', Fig. 6, and an encircling thin strip of metal 40 having a cutaway portion which acts as a separator gate. In the lower portion of the block 36 is a tack passage 43 registering with an opening 44 in the block 29, while in the upper portion of the block above the plate 28 is a short notch 45 terminating in a circular opening 45<1> adapted to register with the opening 39<1> at the end of the separating movement. A removable inspection plug 46 inserted in the block 36 is formed with a right-angled passage 47 connecting the opening 45<1> with a passage 48 in the lug 34 and a passage 54 in the pin 33 and member 31. A passage 55 in the block 29 terminates in the member 31 near the end of the passage 54, and these two passages 54, 55 are adapted to be connected at the desired time by a port 56 in the oscillating-member 32. The port 56 of each separator is connected to a common passage in the supporting-bracket 30, Fig. 1, an opening 57 in which is connected to a compressed-air-supply means. Any one of the separators is adapted to be oscillated once in each cycle of operations by a lever 59, 60, or 61 connected to the block 32 and operated as described in Specification 669/15, the movement of the block being limited by the engagement with a stop of a surface 53, Fig. 6, on a tailpiece 52; the return movement is effected by a spring 50, Fig. 4. The openings in the blocks 29 are connected by pipes 83, Figs. 1 and 11, to passages 86, 87, 88 in a plate 84 detachably held on an extension of the bracket 30 by a clamp 85; these passages terminate in a single passage 89, and at each junction is located a pivoted plate 90. The passage 89 leads to a short pipe 95 carried by a pivoted and spring- mounted block 94, and then to the tack block 5. The compressed-air-supply means comprises a pump, Fig. 7, having an outlet 101 which is connected to the opening 57 in the bracket 30. The compression stroke is effected through a spring 104' surrounding the piston-rod 104, which carries a block 109, Fig. 8, formed with two surfaces 110, 111 adapted to coact with cams 112, 113 on a disk 114 on a driven shaft of the machine. The cam 112 first engages the surface 110, and after a certain amount of movement, the cam 113 engages the surface 111 to complete the down-stroke of the piston, which is then returned by the spring 104<1>; the compression stroke is independent of the speed of the machine, and the impulse to the fastener is therefore not affected by any change in speed, or if the machine is turned round by hand. In operation, as the block 32 is oscillated, the port 56 connects the two passages 54, 55 at the moment the opening 39<1> has moved into register with the opening 45<1>, and a blast of air acts on the head of the separated tack and impels it down the passages 43, 83 to the nozzle 95, where it drops into the tack block 5. The blast of air, moreover, displaces the pivoted plates 90 and closes the adjacent ducts to avoid loss of air pressure through them. Directly the separator returns, the port 56 moves out of register with the passages 54, 55, and the air supply is shut off. Specifications 3559/83, [Class 17, Boots &c.], 2892/90, and 4366/98, [Class 17, Boots &c.], also are referred to.